Since Mal is going to pour an equal amount of milk into two cointaners, Mal is going to pour half of her milk into each one.
To solve this we have to divide the total amount of milk Mal has by 2.
Mal has 1/4 gallon of milk.
Divide by two, is the same as multiplying by 1/2.
Then:
To multiply fractions we multiply numerator by numerator and denominator by denominator. The result of this division is 1/8.